Pioneer HPM-150 after full restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

Pioneer HPM-150 Restoration and upgrade

  • Pioneer HPM-150 Restoration – Part 1: Disassembly
  • Pioneer HPM-150 Restoration – Part 2: Crossover
  • Pioneer HPM-150 after full restoration and upgrade
     
     
    Pioneer HPM-150 after full restoration and upgrade

    Restoration bucket list:

    – refoamed woofers
    – super tweeters taken apart and cleaned

    – new silver plated copper internal wiring
    – new high end banana posts
    – new crossovers with Jantzen Cross Coil Inductor and Clarity cap capacitors all with 2% tolerance, Resistor – MOX 1% tolerance
    – deox potentiometers
    – added internal sound dampening

    – cabinets sanded,
    – front and top sprayed with matt black
    – high gloss finish of walnut veneer: 3 layers of high gloss acrylic with 2 more layers of high gloss yacht varnish on top of it.
    – back side of speaker re-sprayed brown high gloss
    – set of extra castor wheels

    Finished cabinets
    Pioneer HPM-150 Restoration and upgrade

    Ready for black matt paint
    Pioneer HPM-150 restoration

    Spraying
    Pioneer HPM-150 restoration

    After front and top sprayed with matt black
    Pioneer HPM-150 restoration

    before and after
    Pioneer HPM-150

    back side of speaker re-sprayed brown high gloss
    Pioneer HPM-150

    Sanding before first layer of yacht varnish
    Pioneer HPM-150

    First layer of yacht varnish
    Pioneer HPM-150

    Removing super tweeter transformers from original crossovers
    Pioneer HPM-150 crossover

    Drawing of new crossovers
    Pioneer HPM-150 crossover

    Position plan of new crossovers with components
    Pioneer HPM-150 crossover

    Assembled new crossovers
    Pioneer HPM-150 crossover

    Pioneer HPM-150 back panel with banana speaker posts
    Pioneer HPM-150 banana speaker posts

    Pioneer HPM-150 back panel with soldered speaker posts
    Pioneer HPM-150 banana speaker posts
     
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  • 14 thoughts on “Pioneer HPM-150 after full restoration and upgrade

    1. Hello,
      Excellent work, congratulations !!
      Why you replace the original crossover ??..Whats the design you used as upgrade ???
      Thanks in advance

      • Hello there,
        I’ve replaced a crossover because it was low quality and bad design. I used a very same schematic with high grade components and better mechanical and spacial design to limit cross interference of coils. Please follow YouTube channel I will post a new video shortly where I explain some aspect of my decision.

    2. Pingback: Pioneer HPM-150 Restoration – Part 1: Disassembly | Audio Tweak

    3. Pingback: Pioneer HPM-150 Restoration – Part 2: Crossover | Audio Tweak

    4. Pingback: Pioneer HPM-150 Restoration – Part 3: Cabinet restoration & Final assembly | Audio Tweak

    5. Just to comment I have a pair and I upgraded just the caps to all full paper oil caps… YES VERY LARGE VERY EXPENSIVE 200 for each speaker… Oh my the clarity with just them is unreal… HI END BOUTIQUE CAPS… I understand some of the glue and other layout can actually cause interference but my upgrade is nice… drive them with a M90 recap upgraded amp and love them… just can’t decide whats better them or the DSS9’s or actually 4 DDS5’s wired in parallel the base is unreal… they could use better crossovers but darn for duall 10″ drivers and side by side they kick and can handle the M90 full power no breakup….he he I have six pairs of these little gems DSS5 gems and 5.1 is just killer… with 5 M90’s only downside is the heat and power bill… but impressive…

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